langdon



FLUSH VALVE Filed June 23, 1926 N 4 ga rrrfg j U 1 0 JM 2 n g 1 0 5 ml i 4 an 5 W 2 w 5 ATTORNEY Patented Apr. 26, 1927.

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JOHN J. LANGDON, F HARTFORD, CONNECTICUT.

FLUSH VALVE.

Application filed June 23, 1926. Serial No. 118,041.

The invention generally has reference to flush valves and primarily has for its ObJGCl? to provide a more simple, compact and eco- 1o seeks to provide a structure of the type stated wherein a simple rubber diaphragm and a peculiarlyvconstructed valve carried thereby control passage of flushing water into the hopper, a simple free mounted re- 16 lief valve being employed to effect the flushing action by relieving pressure above the diaphragm, and a simple controllable bleed feed by-pass being utilized to effect desired timed refill of the pressure chamber above the diaphragm.

The invention further resides in a particularly constructed cutoff valve carried by the diaphragm and which has the quality of preventing pounding and water friction noises.

With the above and other objects in view that will hereinafter appear, the invention still further resides in the novel details of construction, combination and arrangement 80 of parts, all of which will be first fully described, then be particularly pointed. out in the appended claims, reference being had to the accompanying drawing, in which Figure 1 is a central verticalsection of my improved valve.

Figure 2 is a central vertical cross section of the valve taken on the line 2-2 of Fig ure 1.

Figure 3 is a detail central vertical section illustrating the construction of the cutoff valve.

Figure 4 is a detail perspective view of the spiral vane equipped valveskirt.

In the drawing, in which like numerals indicate like parts in all of the figures, 1 indicates the main valve body which is provided with an upper annular flange 2 providing a seat for the like sized flange 3 pro.- vided at the bottom of the dome-like cap 4.

A heavy rubber diaphragm 5 is secured between the flanges 2 and 3 when the cap 4 is secured upon the body 1 by means of the cap screw 6, thus forming a pressure chamber7 above the diaphragm and in the said cap 4.

The bod 1 is provided with a centrally vertically isposed outlet throat 8 adapted to be connected in communication with the hopper upon which the valve is to be used and the throatway 8 is extended vertically to provide an upstanding valve guide sleeve 9 providing a valve seat 10 at its upper end and which communicates with the chamber 11 which surrounds the sleeve and which in turn communicates with the'water service pipe through the inlet throatway 12.

The valve body is provided with an extension throat 13 at the side opposite the inlet throat 12, the inner end of which ter- .minates in communication with a vertically disposed relief valve mounting passage 14, which said passage vcommunicates at its lower end through the duct 15 with the outlet throat 8 and which is provided adjacent its upper end with a valve seat 16.

A relief valve 17 is vertically slidable in the passage 14 and is provided with a vertical stem extension 18 which passes through and partially restricts the discharge aperture 19 passing through the flanges and diaphragm edge and communicating with the pressure chamber 7 so that pressure in the said chamber will act upon the top of the relief valve through the aperture 19 to normally hold the said valve to its seat. The relief valve is provided with a guide skirt 20 depending therefrom and slidable in the passageway 14, which said skirt terminates ln-a cam shaped bottom 21 adapted to be engaged at times and lifted against the pressure in the chamber 7 through the medium of the lifting pin 22. The operating handle device for actuating the lifting pin is mounted in the throat extension 13 and as the said operatingv lever which I have disclosed is of a common known type, detailed description thereof is deemed unnecessary.

The spring device for normally holding the lifting pin out of engagement with the relief valve is generally indicated at 23. 24 indicates the operating lever, and 25 the mounting by which the same is secured in the end of the throatway 13.

A main valve member 26 is provided and is secured as at 27 to the diaphragm 5 in position for being operable in and guided by the sleeve 9. The valve is provided with a suitable gasket 28 for providing a water-tight seal when seated against the valve seat 10 at the termination. of the said sleeve 9, and the said-sleeve is also provided with a ta ered seating washer 29 effective, when t e valve is being. seated to slowly and gradually close ofi the water passage and overcome all tendency of pounding of the valve.

The valve 26 is also provided with a depending guide skirt 30 slidable in the guide sleeve or neck 9, and the said skirt is provided with interrupted spiral vanes which act, when water is rushing into the neck 9 past the valve, to retard the progress of that water and impart thereto a spiral or swirling action, thus overcoming the undersirable swishing and sloshing sound due to uncon trolled rapid passage of the water.

In one side wall the body 1 of the valve is provided with a tap 31 leading into the chamber 11. This tap communicates through the bleeding duct or refill passage 32, with the pressure chamber 7 above the diaphragm and a needle valve 33 is positioned in the tap 31 and operable for regulating the passage of water from the chamber into the duct or passage 32 and therefrom into the said pressure chamber for a purpose later to be described.

In operation, assuming the parts to be at their normal position illustrated in Figure 1 of the drawing, service pressure will fill the inlet throat 12, lower pressure chamber 11, bleeding duct 32 and pressure chamber-7 and will act to seat both the main valve 26 and the relief valve 17 The valves are so held closed because of the fact that there is no pressure beneath the relief valve and the area of the diaphragm 5 acted upon by the pressure in the upper chamber 7 far exceeds that acted upon by service pressure in the lower chamber 11.

To effect a flushing action of the valve, the operating lever 24 is depressed causing the lifting pin 22 to engage the end 21 of the relief valve and lift the said valve'from its seat. By thus lifting the valve from its seat, water from the pressure chamber 7 is permitted topass through the valve seat and by-pass 14 and through the passage 15 and the outlet throat 8 into the hopper, thus relieving pressure above the diaphragm and causing the said diaphragm to be forced upwardly lifting the valve and permitting passage of water through the neck 9.

While the water is flowing into the hopper through the discharge throat 8, the bleeding duct .32 is permitting passage of water into the pressure chamber 7. This refill action takes place about in four to six seconds, depending uponthe adjustment of the needle valve, thus controlling the length of flushing action.

v When the water refills the pressure chamber, the pressure forces the relief valve again to its seat and also forces the diaphragm down seating the main valve. .The tapered washer 29 with which the valve is equipped parent to those skilled in the art to which the invention relates. What I claim is:

1. A valve of the class described comprising ahollow body having an inlet and an outlet an upstanding neck in which said outlet is formed and terminating in a valve seat, a diaphragm dividing the hollow body into an upper and a lower pressure chamber, the latter surrounding said neck and communicating with the inlet, a valve carried by the diaphragm and adapted normally to seat on said neck to close the outlet, said valve comprising a cupped washer beneath the diaphragm, a gasket in the cupped washer and adapted to seat on said neck, a tapered washer beneath the gasket and having its largest diameter snugly fitting said neck, centering lugs depending from the "tapered washer, a hollow skirt having interrupted spiral vanes centered on said lugs and guided'in the neck, -bolt and nutconnections for securing the diaphragm,

the cupped washer and gasket, the tapered washer and the skirt together, the said bolt being threaded through the tapered washer,

a bleed duct communicating between the up- I seat on said neck to close the outlet, a bleed duct communicating between the upper and lower chambers for normally maintaining balanced pressures therein, means for overcoming said pressure balance to effect a lifting of the diaphragm and an opening of the valve, said valve having a depending skirt guided in the neck and having interrupted spiral vanes to impart a swirling motion to water passing through the valve, said valve having a gasket for seating on the neck, and a tapered washer snugly fitting the neck for the purposes specified.

JOHN J. LANGDON. 

